Hi everyone. My program worked well for years and I did not change anything in the recent 1 year. Today, suddenly, it throw error when make api calls: "The Request was aborted: Could not create Secure SSL/TLS channel".
I have no idea how to resolve this. Please advise if you know how, thank you.
I use C# + ebay .net 4.0 SDK (Version 1131)
Thank you again for your help.